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Search: 29 57 88, 76
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A089020 First value y satisfying x^2 - 3*y^2 = d^2, where d=A072330(n).

Hint : A072330 is ... Common difference n such that primitive triangles exist which are n-arithmetic (i.e. primitive Heronian triangles whose sides in A.P. have common difference n).

Si t'as le Nord en face 2

When you're facing North ... there is the solution, given by OEIS.
A109741 Number of inequivalent (completed) n^2 X n^2 sudokus (or Sudokus).
1, 1, 2, 5472730538
OFFSET : 0,3 - meaning that there are 2 solutions for a 4x4 (2^2) grid and more than 5 billion for a 9x9
COMMENT - See A107739 for definition of a sudoku.

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